firmware/base/src/msgs.h

@@ -1,5 +1,6 @@
 #pragma once
 
+#include <pico/stdio.h>
 #include "crc.h"
 #include "stdio.h"
 
@@ -58,15 +59,22 @@ enum {
     TSTATE_BUILD_MSG,
 };
 
-inline void send_tRespState(tRespState *resp) {
+static inline void write_raw(void* data, size_t n) {
+    const uint8_t* a = data;
+    for(size_t i = 0; i < n; i++){
+        putchar_raw(a[i]);
+    }
+}
+
+static inline void send_tRespState(tRespState *resp) {
     resp->crc = crcFooter(*resp);
-    fwrite(resp, 1, sizeof(tRespState), stdout);
+    write_raw(resp, sizeof(tRespState));
     fflush(stdout);
 }
 
-inline void send_tRespEndCalib(tRespEndCalib *state) {
+static inline void send_tRespEndCalib(tRespEndCalib *state) {
     state->crc = crcFooter(*state);
-    fwrite(state, 1, sizeof(tRespEndCalib), stdout);
+    write_raw(state, sizeof(tRespEndCalib));
     fflush(stdout);
 }
 

firmware/base/tusb/tusb_stdio_driver.c

@@ -51,7 +51,7 @@ static void stdio_dual_usb_out_chars(const char *buf, int length) {
         tud_task();
         tud_cdc_n_write_flush(itf);
         if (!stdio_dual_usb_connected() ||
-            (!tud_cdc_write_available() &&
+            (!tud_cdc_n_write_available(itf) &&
              time_us_64() >
                  last_avail_time[itf] + STDIO_DUAL_USB_STDOUT_TIMEOUT_US)) {
           break;